<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>如何使用js</title>
	<!-- <script>
		//js代码
		alert('你好');
		alert('你好吗');
	</script> -->
	<script src="js/test1.js">
		alert('你好');
	</script>
</head>
<body>
	<h1>如何使用js</h1>
	<script>
		
	</script>
</body>
</html>